Draw-gear and buffing apparatus.



UNITED STATES JOHN H. MCCORMICK.

0F BEXLEY. OHIO.

DRAW-GEAR AND BUFING APPARATUS.

Application tled March 8 1913.

.lle it known that l. Joux ll. lllcConnuiK, :t ritizen ot' the llnited States, residing at Bexley, in the eounty of l"ranl\'lin and State of Ohio. ha re invented eertain new and useful linprowuients in I).ra\\vtnar :ind liutling Apparatus. ot' uliieh the following is a speeitieation.

My invention relates to those dei'ires treed for resisting and absorbing shocks and pan tirulin'ly to dran gear and bulling apparatus.

(lne olijeet ot' niy invention is to .so eonstrnet a deriee ot' this kind. to which read)v uct-.ess may lie had for purposes of inspection and in which the multiplicity ot' parts usually found in the assemblage of these deviens, is very materially reduced. ln car rying out this idea. l preferably provide a lurality ot" frietion ineinhers which are identical in shape and n'liieh may. therefore. be used interehangeably.

My friction members are preferably provided with formations that. when the ineinbers are in their' asseinhled eondition, will resist their transverse moieinent when nnder compression. ly this eonstruetion l ain enabled to eliminate the use of all types of Casings und at the saine tinie attain nraetil e: lly the saine amount, ot' t'rietion surtare as with a casing. ly oppositely disposing adjacent frietion members and eonsequently providingr these formi-.tions upon opposite ends of adjacent frirtion members7 l provide a structure that will give a very oven and uniform distribution ot the internal fores over the trietion Ysur't'aees. The for mations thus arranged. mayl also he eoir Structed that their terminating;` shoulders muy he used for the purpose ot' limitingl the longitudinal mori-nient ot the gears as a Whole. l also desiralily longitudinally taper my friction nieinhers and resist their transverse movement when under eompression. by an unyieldingr strurture' preferably adjaeent eatfli end of they assembled gear. This unyielding portion l desirahly mido; :in integral portion ot' the resisting if ronni'ionly used in emineetion with of t`ni1-1 tyiie.

The preferred eniliodinieut of my in\en tion shown in the awonipanying draw- 'l., in which .similar rhai'arters of refer- Gliee. designate rorresponding parts. and in which:

Figure l is n side elevation of rnv draft geur .shown assembled and removed from its Specification of Letters Patent.

Patented Feb. 5T, :915.

Serial No, 752.917.

rigging. Fig. 2 is a ventral longitudinal ser tion of the structure .'iioun in Fig. l. Fig. Z2 is a ieu ot' the structure shiiu'n in lvigfl and lookin;r from the lett ot' the drawing. and. lig. l is a eetion taken on line Q4 ot' Fig. l with the .spring renioyed.

A\ly inyention is' shown as comprising :L plurality ot' seetornl friction members l., earl; proyided with a teiuiinal lug).r 2. These lugs 15 have an inclined fare Il. Whieh serves as a edging taee in a inanner to be herev iiiat'ter deseritied. ihen assembled. these irirtion members forni a substantially solid cylinder and. as; will lie noted. each abutting member is opposite/lv disposed. By refer ence to Figs. 3 and 4. it will further be noted that each of the members l has its outer faces 4 longitudinally tapered inward. Also. thel .abutting fares 5 and are tapered inward. the purposes of which will be hereinafter described. llaeh frietion member l is provided 'with wing' 'formations 7 adapted to eoact with the fares t to give resisting friction surfaces. The alternate arrangeinent of these friction ineml'iers thereby' Jrorides an embraeingy strueture at each eno of the gear for the small ends oteneh of the frietion members: and thereby prevents their outward displaeeuieut and serres ars a means for resisting their transyerse movement.

lneireling the entire assemblage of ilrieu tion members is the ordiury eoiled spring R. which normally maintains the friction ineinhers in condition ot' rrlease. in order to attain the desired erigir-5 aetion under ronipirssion ot' the t'rietion nieinliers. l proriiie iredg'injl means .vlii/ii eoaet with the sui-tures il. wliirh means l have shou'n ns beiulgr the portion 1i integrally formed upon the eoiled spring ln order to attain the inaxiinuin eapaeity. it is essential that these edging means he unyielding transversely und l. therefore. preferably weld tho two end eoils ol the spring Q. together to form a solid ring. which ring;r may he. liereled as shown at l() to roaet with the wedgint; faves :i ot the. frietion members,

Froi'n the alternate arrangement of the t'rimion inriniieri-i l. it nii he seen that, the spi-ing Q normally tends to iaintain inem in tfll nieuw position. lait; upon the appr ration oi iireissuw at either end of tia? fgiiar, the spring R xviii naturaliy heroine rompressrd. the fares lll of the end foils netingr as a Wedge upon the ineined 'turen 3 of tire ings 2. tiiewiiy nedffiue: the members into close relative engagement. The longitudinal taper of cach of the friction members 1, upon their relative movement, also creates a vvedging action increasing the capacity of the gear and thereby causing a slight expansion of the assembled members.

This ex iansion is )ermitted b a relative movement between the surfaces 10 of the end coils 9 and the vvedging faces 3 of the friction members 1. The vving formations 7 carried by cach of the friction members, terminating in shoulders 11 short of the middle of each member, provide a means for limiting the longitudinal movement of the gear by the oppositely disposed formations coming into engagement with each other. The amount of this movement may, therefore, be regulated by the length of the wing formations 7 from the lugs 2. The longitudinal taper of all the friction faces, aside from creating a wedging action upon compression, also serves a purpose of assisting in release of the gear after it has performed its function.

From the above description, it will be noted that I have provided an extremely simple draft gear in which the friction members themselves form practically the entire gear and which friction members may be used interchangeably, if desired. I have simplified and cheapened the manufacture and repair by building a' symmetrically balanced structure from a substantially single form and size of casting that may be constructed to provide its own casing. Also, by the provision of the wing formations 7, a bearing surface may be had at each end of each of the-friction members of equal intensity and the transverse movement of each of the members regulated thereby. Vhen assembled, my friction members produce a substantially solid segmental cylinder having all its parts interlocking.

What I claim, is:

l. A draw gear and bufling apparatus comprising a plurality of friction members having cooperating friction faces, means for holding said members in assembled condition, and formations carried by said members for resisting their transverse movement under compression.

2. A draw gear and buiing apparatus comprising a plurality of friction members having cooperating friction faces, a spring for holding said members in assembled condition and normally maintaining them in release position, and formations carried by said members for resisting their transverse movement under compression.

3. A draf.Y gear and buffing apparatus comprising a plurality of friction members having cooperating friction faces adapted to offer resistance by longitudinal movement.A a spring for normally maintaining a release position of said members, and Wing formations forming a part of said members for resisting their transverse separation under compression.

'-l. A dravv gear and baiting apparatus comprising a plurality of sectoral friction members having cooperating friction faces adapted to offer resistance by relative longitudinal movement, a spring for normally maintaining a release position of said members, and wing formations forming a part of said members for resisting their transverse separation under compression.

5. .X draw gear and buliing apparatus comprising a plurality of friction members having cooperating friction faces and cX- ternal friction faces, wing formations forming a part of said members and provided vvith internal friction faces contacting with tbe external friction faces of adjacent members, and means for normally maintaining release position of said members.

(i. A draw gear and buffing apparatus comprisin a plurality of sectoral friction members aving cooperating friction faces and external friction faces, adjacent inembers being arranged to offer resistance by relative movement, Wing formations forming a part of said members and arranged to lie in engagement with portions of the external faces of adjacent members, and means for normally maintaining release position of said members.

7. A draw gear and bufling apparatus comprising a plurality of sectoral friction members having cooperating friction faces and external friction faces, adjacent mem` bers being arranged to offer resistance by relative movement, vving formations forming a part of said members and arranged to lie in engagement with portions of the external faces of adjacent members, Wedging shoulders on said members, and a spring encircling said members and arranged to bear directly on said shoulders.

8. A draw gear and buting apparatus comprising a plurality of sectoral friction members having cooperating friction faces and external friction faces, adjacent mem` bers being arranged to offer resistance by relative movement, wing formations forming a part of said members and arranged to lie in engagement with portions of the external faces of adjacent members, wedging shoulders on said members, and a spring encircling said members and arranged to beardirectly on said shoulders, said Wing formations being oppositely arranged on adjacent members and being of a length to engage ea'ch other to limit their relative movement.

9. A draw gear and buing apparatus comprising a plurality of friction members identical 1n structure and engaging each other frictionally, formations carried by llO sepnrntion under c(iinpression. and n spring for normally nmintiiining release position of sniii nii-minfin., siiiii tornmtions limiting the relativi, iongitmiiniii mm'ement of said members,

li. A. iiriiw geur and bning apparatusA comprising); ii plm-:nity of interfitting sectoral friction members identical, in strii'cture and engaging each other riotionaiiy, adjucent members being oppositeijydisposed, n im,r formations carried by one end of each member adapted to engage frictionaiiy the free emi of the, opposing members, and n spring tor nornmiiy maintaining reiezise pw siiion of said members.

l. .X draw geur and initiing apparatus comprising :i pinrniity of friction members. formations4 forming :i pur-t ot said n'innibers for vontroiiing their transwrse. niorenienny nerfigin' @miniers unrrieti by Suid membersA and :i .spring 'for normatif: maintaining reA lense position o1l said members :ind oozirting with sind mining 'faces to produce zi wedging;v action.

125. A iirziw geur und butiing apparatus oomprising :i pinrniity of friction members, mining siioiiiiiers Carried by said members, formations rari-ieri by said members for controiiingr their transverse movement, and it spring for nornmiiy maintainingr 'reiense pir 'with sition of said membnrs, said s provided with Wedging fases 1ro wth said Wedging siioni lli. A draw gear mii bniii tipps' pinraiity of friction me shoulders carried by said me tions rarrieri by said mei ting their t 1:insrerse Inoremont, tions iimitingf tire iongitndinui mi said members, :ind n spring for cr iii .rotiging siionitiirs. ,v 15, rirnw gear ami bntin; mi f roniprising :i piuraiitjs if in1L ri torni friction members tiipereifi in ltion of their movement. siifniide" membersl for iimiting morffment.y Wei i k sind members. und :i` taining le: Vi Linn u* bers. said spring ng with anni ,w shonifiers.

i6. A draw geur l La bniiing appa voniprisifitgj i1 pinrnm' of interiitting ivtion member tfipcred in the i.

morennnt. 'wedging sinon" carri 1. id nieminlrsq formations c by :inni nwmbrrs: for i-nfitroiiini their t versi, more-ment. siii-r". fori'nntions inn u riw iongitmiinni mm ement oi' sind ni tours'.y und :i spring tor nornniiij; maintninin" re ieiiifi position of nid members`I siii 'ifi ini. ig both its pints provided with neiging 'fuif -1.

in testimony whereof I zit'rix my signature in gir-delire ot' two witnesses.

r rl

Wi i nesses si n.1 n L. Boon, ii. Pnnnrs. 

